Both guys had a pretty tight 3B range, so I cold called to reevaluate on the flop. I actually thought about folding but that seemed incredibly weak; I'm losing like a mad man KK x AA against known or unknown players. I really don't know what to do.
Can I fold KK in a spot like this?

Preflop: We could let go KK in this spot considering that MP only 3-bets 2% in 300 hands. Alternatively you can 4-bet small and fold because a lot of these guys will just call QQ/AK and shove only AA and some KK.